A vinyl compound is any
organic compoundthat contains a vinyl group (also called ethenyl), −CH=CH2. These are derivatives of ethene, CH2=CH2, with one hydrogenatom substituted with some other group.
A related phrase is vinylidene which stands for a double-bonded two-carbon residue with two rather than one substituents, for instance in
The vinyl group forms part of the
allylgroup and is also contained in all acrylates. Many alkenes contain a vinyl group.
The vinyl group can be made to polymerize, forming
vinyl polymers. In these polymers, the double bonds of the vinyl monomers turn into single bonds and the different monomers are joined by single bonds. This is an instance of addition polymerization. There are no vinyl groups in the resulting polymer. It is also important to ascertain the absence of unreacted vinyl monomer in the final product when the monomer is toxic or reduces the performance of the plastic.
Polyvinyl chloride(PVC) is made by polymerizationof the monomer vinyl chloride(chloroethene) CH2=CHCl
Polyvinyl acetate(PVAc) is made by polymerization of vinyl acetate. In a water suspension, this is used as a glue.
Polyvinyl alcohol(PVA) is produced by hydrolysisof polyvinyl acetate. (Not by polymerization of the monomer vinyl alcohol or ethenol, which is an unfavored keto-enol tautomerof acetaldehyde.)
etymologyof "vinyl" is the Latin"vinum" = " wine", because of its relationship with alcohol(in its original sense of ethyl alcohol).
Wikimedia Foundation. 2010.